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1.
信息安全工具包用于开发信息安全应用产品。传统工具包的主要目标是通用性,其内部安全强度不高。文中描述了一个基于安全内核的、具有高安全性的信息安全包体系架构的设计。安全内核为工具包内的信息访问提供安全保障。在安全内核中实现了多种安全策略(BLP,CW,ACL),通过这些安全策略的结合使用,保护内部信息的机密性和完整性,并执行用户的验证。工具包使用对象模型和层次模型,能够方便用户使用,同时利于对工具包进行维护。  相似文献   

2.
信息安全工具包是用于开发信息安全应用产品的工具.目前我国使用的工具包都是国外产品,安全可靠度不高,很难保证使用它们开发的安全产品的安全性.对一个国产信息安全工具包(CIST)的结构设计进行了研究.在CIST中,内部信息安全性是其主要需求.CIST有一个安全内核,该内核使用了多种安全策略.CIST的安全性进行评估表明它能够适用于安全强度要求高的场合.  相似文献   

3.
Nonlinear model predictive control (NMPC) is a control strategy based on finding an optimal control trajectory that minimizes a given objective function. The optimization is recalculated at each control cycle and only the first control values are actually used. The dynamics of the system can be nonlinear and there can be constraints on states and controls. A new toolkit called VIATOC has been developed that can be used to automatically generate the code needed to implement NMPC. The generated code is self-contained ANSI C and the compiled program has a small footprint. In VIATOC, the gradient projection method is used to solve the nonlinear optimization problem. Barzilai–Borwein type step length selection for the gradient method has also been implemented. The performance of the controllers generated with the toolkit is compared with those solved with the ACADO toolkit and HQP. The performance of the optimization is compared with two different test cases with different numbers of controls and states. The first one is based on a model of a pendulum hanging freely on a movable platform. The second one is a more complex model of a chain of three masses connected by springs. Seven different prediction horizons between 10 and 100 steps are used. When the time to achieve a near optimum solution is measured, VIATOC is in most cases the fastest one when the length of the prediction horizon is shorter than 70 steps.  相似文献   

4.
信息安全工具包用于开发信息安全应用产品.基于传统工具包的缺陷,提出了一种新的基于模块的信息安全工具包体系架构.  相似文献   

5.
As animations become more readily available, simultaneously the complexity of creating animations has also increased. In this paper, we address the issue by describing an animation toolkit based on a database approach for reusing geometric animation models and their motion sequences. The aim of our approach is to create a framework aimed for novice animators. Here, we use an alternative notion of a VRML scene graph to describe a geometric model, specifically intended for reuse. We represent this scene graph model as a relational database. A set of spatial, temporal, and motion operations are then used to manipulate the models and motions in an animation database. Spatial operations help in inserting/deleting geometric models in a new animation scene. Temporal and motion operations help in generating animation sequences in a variety of ways. For instance, motion information of one geometric model can be applied to another model or a motion sequence can be retargeted to meet additional constraints (e.g., wiping action on a table can be retargeted with constraints that reduce the size of the table). We present the design and implementation of this toolkit along with several interesting examples of animation sequences that can be generated using this toolkit.  相似文献   

6.
This article describes SwingStates, a Java toolkit designed to facilitate the development of graphical user interfaces and bring advanced interaction techniques to the Java platform. SwingStates is based on the use of finite‐state machines specified directly in Java to describe the behavior of interactive systems. State machines can be used to redefine the behavior of existing Swing widgets or, in combination with a new canvas widget that features a rich graphical model, to create brand new widgets. SwingStates also supports arbitrary input devices to implement novel interaction techniques based, for example, on bi‐manual or pressure‐sensitive input. We have used SwingStates in several Master's‐level classes over the past two years and have developed a benchmark approach to evaluate the toolkit in this context. The results demonstrate that SwingStates can be used by non‐expert developers with little training to successfully implement advanced interaction techniques. Copyright © 2007 John Wiley & Sons, Ltd.  相似文献   

7.
8.
We present in this article a MATLAB toolkit with a user-friendly graphical interface for composite nonlinear feedback control system design. The toolkit can be utilized to design a fast and smooth tracking controller for a class of linear systems and nonlinear systems with actuator and other nonlinearities as well as with external disturbances. The parameters of the controller can be tuned easily on the user panel or autotuned by the toolkit. The toolkit is capable of displaying both time-domain and frequency-domain responses on its main panel and generating three different types of control laws, namely, the state feedback, the full-order measurement feedback and the reduced-order measurement feedback controllers. The usage and design procedure of the toolkit are illustrated by practical examples on a rotational/translational actuator (RTAC) system and a hard disk drive servo system. The toolkit can be utilized to design servo systems that deal with point-and-shoot fast targeting.  相似文献   

9.
底层读写器协议(LLRP)作为射频识别系统的标准底层协议,为射频识别系统的广泛应用提供了先决条件;通过开发LLRP协议工具包,阐述LLRP协议的工作原理以及工具包的设计、实现和功能性测试;该工具包为射频识别中对读写器进行管理配置以及对标签进行盘存、访问操作提供标准接口;通过使用该工具包,开发人员可以快速且有效地完成射频识别应用系统软件开发。  相似文献   

10.
基于Pstools工具包、Socket网络通信以及远程唤醒技术设计实现一个局域网计算机远程控制系统。该系统实现局域网内计算机的远程唤醒、远程关机/重启、取消关机/重启、远程锁屏、文件传输以及屏幕广播等各种管理功能,能够极大提高网管的工作效率。经实验中心实际使用,验证该系统具有很高的可靠性和稳定性,特别适用于局域网内计算机远程管理,如高校实验中心、公司企业局域网等场所。  相似文献   

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